摘要
本实验以salophen为功能单体,Th(Ⅳ)离子为模板离子,乙二醇二甲基丙烯酸酯(EGDMA)作交联剂,用偶氮二异丁腈(AIBN)作引发剂在烯基化的磁性Fe3O4粒子表面上热聚合制备磁性印迹材料.探讨此印迹材料对钍(Ⅳ)的最佳吸附条件.结果表明:此磁性印迹材料在pH为4.5,在70μg/mL钍(Ⅳ)中吸附30 min可以到达最大吸附容量42.54μg/mg.Th(Ⅳ)印迹材料相对U(Ⅵ),La(Ⅲ)和Ce(Ⅲ)的相对选择性系数分别是62.4,82.2和93.1,说明此材料可以在La(Ⅲ),Ce(Ⅲ)和U(Ⅳ)的存在下检测Th(Ⅳ).
In the paper, the magnetic imprinting material was synthesized by surface im- printing technology on the surface of vinyl-functional magnetic Fe304 particles, with salo- phen as functional monomer, Th (Ⅳ) ion as template, ethylene glycol dimethacrylate (EGDMA) as the cross-linking and azodiisobutyronitrile (AIBN) as the initiator. The opti- mum conditions for absorption of Th ( Ⅳ) ion on the magnetic imprinting material were dis- cussed. The results show that the maximum absorption capacity of imprinting material is 42.54μg,/mg when the initial concentration is 70 p,g/mL in 30min contact time at pH 4.5. the relative selectivity coefficient values of the synthesized adsorbent for Th( Ⅳ )/La (Ⅲ ), Th (Ⅳ )/Ce ( Ⅲ ), and Th ( Ⅳ)/U ( Ⅵ) were 82.2,93.1 and 62.4 times greater than that of the non-imprinted matrix, respectively. It suggests that Th ( Ⅳ ) ion could be detection using the magnetic Th (Ⅳ)-imprinted polymer in the present of La (Ⅲ),ce(Ⅲ) and U(Ⅳ).
出处
《南华大学学报(自然科学版)》
2012年第2期74-79,共6页
Journal of University of South China:Science and Technology
基金
国家自然科学基金资助项目(11175080)
湖南省自然科学基金资助项目(10JJ6025)
作者简介
何芳芳(1987-),女,湖南永州人,南华大学化学化工学院硕士研究生.主要研究方向:功能材料合成与应用.
通讯作者.